Is my HbA1c within the target range?

For evidence-based information about HbA1c (Glycated Hemoglobin) Test, visit this page.

How often should I get tested?

For evidence-based information about HbA1c (Glycated Hemoglobin) Test, visit this page.

What factors may be contributing to my result?

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Do I need any additional tests or follow-up?

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Which other tests should be considered alongside HbA1c?

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Home → Tests → HbA1c

HbA1c (Glycated Hemoglobin) Test

✅ Up to date🔬 Evidence: StrongEndocrine & Metabolism

Diğer adları: A1c, A1c test, Glycated hemoglobin

⚠️

Discuss your test results with your doctor. This page is for informational purposes only and does not provide a diagnosis.

⚡ Key Facts

• Measures your average blood sugar level over the past 2–3 months • Used in diabetes assessment and monitoring • No fasting required • Normal: <5.7% | Prediabetes: 5.7–6.4% | Diabetes: ≥6.5%

🧪 What Does This Test Measure?

The HbA1c test measures glycated hemoglobin to reflect average blood sugar levels over the past 2–3 months, without requiring fasting.

📋 Why Is It Ordered?

Used in diabetes assessment and monitoring. It may also be used in prediabetes screening and long-term glycemic follow-up.

🔧 Preparation

No fasting is required for the HbA1c test. It can be done at any time of day.

📊 Reference Ranges

Normal: <5.7% | Prediabetes: 5.7–6.4% | Diabetes: ≥6.5% ⚠️ These thresholds may vary depending on the method used, the laboratory, and the clinical context. Discuss your results with your doctor.

⬆️ High Values

Elevated HbA1c may be associated with diabetes, prediabetes, or persistently high blood sugar levels.

⬇️ Low Values

Low HbA1c may be associated with certain types of anemia, liver disease, frequent hypoglycemia, or recent blood loss. It should not be interpreted without clinical context.

⚙️ What Can Affect Results?

Certain conditions may make HbA1c less reliable as a reflection of actual blood sugar levels: iron deficiency anemia, hemoglobin variants, kidney disease, pregnancy, recent blood transfusion.

🔬 Evidence Summary

Strong evidence: 3 guidelines, 1 systematic review/meta-analysis, 2 clinical trials, and 2 reviews.

✅ Key Takeaways

💡

What you learned: HbA1c reflects your average blood sugar over 2–3 months. If your result is 5.7% or above, it may warrant further evaluation with your doctor.

⛔

A single HbA1c result cannot diagnose diabetes on its own. Clinical context and confirmatory testing are needed.

🔬 Sources Used on This Page

8 sources · Most recent publication: 2025

📋

Guideline

Expert society and guideline recommendations

sources

📊

Systematic review / meta-analysis

Combined analysis of multiple studies

source

🔬

Clinical trial (RCT)

Controlled research conducted in humans

sources

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Review

Comprehensive topic evaluation

sources

Overall assessment: Evidence level for this topic is strong. This page is supported by 3 guidelines, 1 systematic review/meta-analysis, 2 clinical trials, 2 reviews.

📝 Questions to Ask Your Doctor

Be prepared for your appointment. Add questions to your list.

Last reviewed: 3/24/2026

Next review: 9/24/2026

🔗 Related Topics

🩺 Type 2 diabetes🩺 Prediabetes🧪 Fasting blood glucose🧪 OGTT (Oral glucose tolerance test)

⚖️ This page does not replace medical advice. Make treatment decisions with your doctor.
Content is based on scientific studies indexed in PubMed and current clinical guidelines.